Director, Laura Fotheringham, says they are an American Black vulture, named Blackie, while the other is a yellow-billed kite named Capone.
She says they believe the birds were stolen as their cages were forced open.
As soon as they discovered the crime, Fotheringham informed Cape Nature and laid a charge of theft at the Plettenberg Bay police station.
Blackie was rescued from a pet shop in Krugersdorp in 2018 and spent time at a vulture rehabilitation center in Hartebeespoortdam called Vulpro.
The organisation, who described Blackie as intelligent and charismatic, gave the bird to Raptor Rescue in 2021, on loan, to be an educational ambassador for vultures and their conservation.
The concern was raised that someone might try to sell the birds to be used for muti and the birds will become stressed which will result in dehydration.
Blackie has a ring number: 9A64721
Capone is a Yellow billed Kite and an indigenous species.
His ring number, although some are unclear is 9A05728
Both birds will stress and become dehydrated quickly.
Raptor Rescue has offered a reward for the safe return of both birds.